Method for obtaining high beam quality in a gas dynamic laser

Details Method for obtaining high beam quality in a gas dynamic laser Method for obtaining high beam quality in a gas dynamic laser

1978-04-05

1980-07-29

Davie, James W.

Oscillators

Molecular or particle resonant type

H01S 322

Patent

active

042153212

ABSTRACT:
An apparatus and method for minimizing gas density perturbation within an optical region of a gas dynamic laser to improve the optical quality of the output laser is disclosed. Gas disturbance generators disposed intermediate the throat region of the nozzle and the optical region are adapted for producing a disturbance to the flow to oppose flow density disturbances resulting from shock or expansion waves emanating from the intersection of the ends of the nozzle and side walls. In one embodiment the gas disturbance generator is a protrusion into the gas path. A further embodiment utilizes a jet of gas into the gas path to produce the disturbance. A further embodiment utilizes suction along the side wall to produce the disturbance. The optical quality of the laser energy passing across the gas flow is significantly improved.

REFERENCES:
patent: 3394320 (1968-07-01), Medicus
patent: 3633125 (1972-01-01), Whitehouse
patent: 3671883 (1972-06-01), Smars
patent: 3860885 (1975-01-01), McLafferty
patent: 3998393 (1976-12-01), Petty
patent: 4000477 (1976-12-01), Osgerby

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